An explosion apparently set off by a natural gas leak injured several people and destroyed or damaged several buildings in downtown Springfield, Mass., on Friday afternoon.
People were knocked off their feet by the blast, which left sidewalks littered with glass from blown out windows, NBC affiliate WWLP-TV reported.
Ambulance crews were still treating victims several hours later, as helicopters buzzed overhead into the evening.
The blast was heard for miles.
One of the buildings destroyed was a bar that was not open for business at the time, WWLP said.
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